Time-dependent corrosion resistance of zinc phosphate coating on AZ31B magnesium alloy in sodium chloride solution

2011 ◽  
Vol 102 (12) ◽  
pp. 1511-1517
Author(s):  
Gao Huanfang ◽  
Zhang Shengtao ◽  
Liu Chenglong
Keyword(s):  
Corrosion Resistance ◽  
Sodium Chloride ◽  
Magnesium Alloy ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Zinc Phosphate ◽  
Time Dependent ◽  
Phosphate Coating ◽  
Az31b Magnesium Alloy

Microstructural And Corrosion Resistance Study Of Sintered Al-Tin In Sodium Chloride Solution

2019 ◽  
Vol 18 ◽  
pp. 2881-2886 ◽  
Author(s):  
Samuel Olukayode Akinwamide ◽  
Neo Tshabalala ◽  
Oluwasegun Eso Falodun ◽  
Samuel Ranti Oke ◽  
Ojo Jeremiah Akinribide ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Sodium Chloride ◽  
Chloride Solution ◽  
Sodium Chloride Solution

Study on Electroless Ni-P Deposit on W-Cu Alloy and its Anti-Corrosion Mechanism

2008 ◽  
Vol 373-374 ◽  
pp. 240-243 ◽  
Author(s):  
Long Hao ◽  
Ye Ming Zhang ◽  
Chao Yang ◽  
Hua Zhu ◽  
Xu Hui Mao ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Sodium Chloride ◽  
Potentiodynamic Polarization ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Alloy Coating ◽  
Corrosion Mechanism ◽  
Alloy Substrate ◽  
Cu Alloy ◽  
Electroless Ni

With suitable pretreatment, a compact and even nickel-phosphorus alloy coating was obtained on W-Cu alloy by electroless deposition from solutions containing nickel sulphate as a source of nickel and sodium hypophosphite as the reducing agent and a source of phosphorus. The Ni-P coating was normally prepared from acidic baths at high temperature of the order of 90oC with the pH of 4.8 and it was smooth and uniform and exhibited high crystal refinement and high microhardness and superior corrosion resistance. The microhardness, adhesion and corrosion resistance mechanism of Ni-P deposit were studied. The microhardness of the Ni-P alloy deposit increases greatly by tempering at various temperatures. The Ni-P deposit has a strong adhesive force with W-Cu alloy substrate checked by thermal shock test and scribe test. The anti-corrosion ability of Ni-P coating and its anti-corrosion mechanism were measured using immersion experiment and potentiodynamic polarization techniques. The results showed that the corrosion resistance of Ni-P coating was higher than that of W-Cu alloy substrate in the 10vol.% sulfuric acid, monitoring sweat solution and 3.5wt.% sodium chloride solution. The anti-corrosion mechanism of electroless Ni-P coating immersed in 3.5wt.% sodium chloride solution was studied using potentiodynamic polarization techniques. The surface micromorphological morphology and structure of the Ni-P coating were investigated using Scanning Electronic Microscope (SEM) and X-ray Diffraction (XRD). The results indicated that the Ni-P alloy coating consisted of microcrystals and it was amorphous in structure, and the electrochemical measurement showed passive film formed on Ni-P coating during immersion test in the 3.5wt.% sodium chloride solution.

Corrosion Resistance of High-Alloyed Material UNS N08028 in Sodium Chloride Solution

2014 ◽  
Vol 893 ◽  
pp. 440-443
Author(s):  
Li Na Zhang ◽  
Jerzy A. Szpunar ◽  
Jian Xin Dong ◽  
Mai Cang Zhang
Keyword(s):  
Corrosion Resistance ◽  
Sodium Chloride ◽  
Corrosion Rate ◽  
Current Density ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Corrosion Potential ◽  
Ph Value ◽  
Chloride Concentration ◽  
Decreasing Ph

The influence of ions chloride concentration and pH value on the corrosion resistance of high-alloyed material UNS N08028 in the sodium chloride solution is investigated. Results show that the corrosion potential is active cathodically with the increase of chloride concentration. The current density and corrosion rate both increase with increasing chloride concentration and decreasing pH value.

Improvement in the corrosion resistance of stainless steel 304L in sodium chloride solution by a nanoclay incorporated silane coating

RSC Advances ◽  
2015 ◽  
Vol 5 (1) ◽  
pp. 706-716 ◽  
Author(s):  
F. Ansari ◽  
R. Naderi ◽  
C. Dehghanian
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Sodium Chloride ◽  
Corrosion Protection ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Sol Gel ◽  
Nacl Solution ◽  
Stainless Steel 304L ◽  
Silane Coating

An eco-friendly silane sol–gel coating incorporating nanoclay was formulated to provide an effective corrosion protection for stainless steel 304L in a NaCl solution.

scholarly journals Corrosion Behavior of CoCrFeNiTax Alloys in 1 M Sodium Chloride Aqueous Solution

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5157
Author(s):  
Chun-Huei Tsau ◽  
Rong-Wei Hsiao ◽  
Tien-Yu Chien
Keyword(s):  
Aqueous Solution ◽  
Corrosion Resistance ◽  
Electrochemical Impedance Spectroscopy ◽  
Sodium Chloride ◽  
Corrosion Behavior ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Electrochemical Impedance ◽  
Eutectic Structure ◽  
Different Temperatures

This paper investigates the effects of Ta content on the microstructures, hardness and corrosion behavior of as-cast CoCrFeNiTax alloys. The results indicate that the addition of Ta can change the microstructures of these alloys to dual-phased structures (FCC + HCP), as well as increasing their hardness. This study uses constant galvanostatic/potentiometric methods to measure the polarization curves of CoCrFeNiTa0.1, CoCrFeNiTa0.3 and CoCrFeNiTa0.5 alloys in deaerated 1 M sodium chloride solution at different temperatures. Electrochemical impedance spectroscopy is also used to analyze these alloys in sodium chloride solution. The results indicate that the CoCrFeNiTa0.5 alloy has a eutectic structure and the highest hardness. Furthermore, although the CoCrFeNiTa0.5 alloy has the best corrosion resistance, the CoCrFeNiTa0.3 alloy has the best pitting resistance among these alloys.

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